Influence of Great Lakes Water Composition on Atmospheric Aerosol Emissions

Andrew Ault, Kerri Pratt, Nate May, Jessica Axson, Isabel Colon-Bernal, Alexa Watson

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Photo Credit: Dave Sandford

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Fundamental Characterization

Prior Evidence for Lake Spray Aerosol

Chung et al. 2011

Next: Mobile Laboratory

Next: HAB Samples

Direct Evidence of Lake Spray Aerosol

July 2015

Integrating Lab and Field

Fundamental Characterization of Aerosol Generated from Simulated Lake Water

Lake Spray Aerosol Generator

Generated Bubbles

Ault & Pratt

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Ion Concentration: Ocean vs. Lake

May et al. in prep

Quick Peak During a Wave Event on Lake Michigan Shows a Distinct Class of Lake

Generated Particles

Ault & Pratt

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Field Study Site: Van Buren State Park SEM-EDX of Field Particles from Lake

Single Particle Mass Spectrum of Lab-Generated Particle from

Lake Michigan Water

Markers for Biological Activity

Axson et al. in prep

Strong Agreement between Aerosol from Lake Michigan Water and Salt Standards

Incr

easin

g Sa

linity

Increasing Bubble Size

Bubble Size Distributions

Ault & Pratt

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Aerosol Size Distributions

SEM

Bubble Images

May et al. in prep

Next Steps: Mobile Laboratory for Full Ambient Sampling & Analysis of Aerosols

Generated from HABs The Big Question: What

Do The Organics Tell Us? Mobile Laboratory for Housing State-of-the-Art Suite of Instrumentation

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Questions?

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EHS Chemistry Photo Credit: Dave Sandford